7901922661 has 8 divisors (see below), whose sum is σ = 8355771648. Its totient is φ = 7460508000.

The previous prime is 7901922659. The next prime is 7901922667. The reversal of 7901922661 is 1662291097.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 7901922661 - 2¹ = 7901922659 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7901922667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3107275 + ... + 3109816.

It is an arithmetic number, because the mean of its divisors is an integer number (1044471456).

Almost surely, 2^7901922661 is an apocalyptic number.

It is an amenable number.

7901922661 is a deficient number, since it is larger than the sum of its proper divisors (453848987).

7901922661 is a wasteful number, since it uses less digits than its factorization.

7901922661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6217163.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 7901922661 is about 88892.7593283052. The cubic root of 7901922661 is about 1991.7932591800.

The spelling of 7901922661 in words is "seven billion, nine hundred one million, nine hundred twenty-two thousand, six hundred sixty-one".